Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Please help!
Please use at least two string functions of your choosing from chapter-10 (The book is Starting Out with C++ from Control Structures to Objects 9th Edition). Please read the encrypted code from an input file to save time.
Thank you!
![code for thr
ming Project 7 or 8 with no changes.
11. Your country is at war and your enemies are using a secret code to com
municate with each other. You have managed to intercept a message that
reads as follows:
:mmZ\dxZmx] Zpgy
The message is obviously encrypted using the enemy's secret code. You
have just learned that their encryption method is based upon the ASCII
in a string are encoded using this system. For example, the letter "A" is
code. Appendix 3 shows the ASCII character set. Individual characters
encoded using the number 65 and "B" is encoded using the number 66.
Your enemy's secret code takes each letter of the message and encrypts it
as follows:
if (original Char+key > 126) then
encrypted Char = 32+ ((original Char + key) - 127) bloode
else
encrypted Char = (original Char + key)
For example, if the enemy uses key = 10 then the message "Hey" would be
encrypted as:
"eld" nuoning](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa5063545-a84a-474e-9360-84a5c5ffd9a3%2F1478f8a5-c9e7-477e-9f6c-bdc13f56cbd1%2F0opi6ch_processed.png&w=3840&q=75)
Transcribed Image Text:code for thr
ming Project 7 or 8 with no changes.
11. Your country is at war and your enemies are using a secret code to com
municate with each other. You have managed to intercept a message that
reads as follows:
:mmZ\dxZmx] Zpgy
The message is obviously encrypted using the enemy's secret code. You
have just learned that their encryption method is based upon the ASCII
in a string are encoded using this system. For example, the letter "A" is
code. Appendix 3 shows the ASCII character set. Individual characters
encoded using the number 65 and "B" is encoded using the number 66.
Your enemy's secret code takes each letter of the message and encrypts it
as follows:
if (original Char+key > 126) then
encrypted Char = 32+ ((original Char + key) - 127) bloode
else
encrypted Char = (original Char + key)
For example, if the enemy uses key = 10 then the message "Hey" would be
encrypted as:
"eld" nuoning

Transcribed Image Text:Character
H
e
y
ASCII code
72
101
121
Programming Projects
Encrypted H=
(72+ 10)
= 82 = R in ASCII
Encrypted e
(101 + 10) = 111 = o in ASCII
Encrypted y = 32 + ((121 + 10) - 127) = 36 = $ in ASCII
Consequently, "Hey" would be transmitted as "Ro$."
Write a program that decrypts the intercepted message. The ASCII codes
for the unencrypted message are limited to the visible ASCII characters.
You only know that the key used is a number between 1 and 100. Your
program should try to decode the message using all possible keys between
1 and 100. When you try the valid key, the message will make sense. For
all other keys, the message will appear as gibberish.
The time should be
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